Fix and improve FlexFEC configuration for RTP/RTCP.

webrtc/media/engine/fakewebrtccall.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 252 matching lines @@
 void FakeVideoSendStream::InjectVideoSinkWants(
     const rtc::VideoSinkWants& wants) {
   sink_wants_ = wants;
   source_->AddOrUpdateSink(this, wants);
 }
 
 FakeVideoReceiveStream::FakeVideoReceiveStream(
     webrtc::VideoReceiveStream::Config config)
     : config_(std::move(config)), receiving_(false) {}
 
-const webrtc::VideoReceiveStream::Config& FakeVideoReceiveStream::GetConfig() {
+const webrtc::VideoReceiveStream::Config& FakeVideoReceiveStream::GetConfig()
+    const {
   return config_;
 }
 
 bool FakeVideoReceiveStream::IsReceiving() const {
   return receiving_;
 }
 
 void FakeVideoReceiveStream::InjectFrame(const webrtc::VideoFrame& frame) {
   config_.renderer->OnFrame(frame);
 }
@@ skipping 309 matching lines @@
 }
 
 void FakeCall::OnSentPacket(const rtc::SentPacket& sent_packet) {
   last_sent_packet_ = sent_packet;
   if (sent_packet.packet_id >= 0) {
     last_sent_nonnegative_packet_id_ = sent_packet.packet_id;
   }
 }
 
 }  // namespace cricket